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Researchers have successfully reversed one of the effects of ageing in animals, and could be used to treat human diseases.

The UNSW study found that ageing occurs when communication between cells break down and levels of the chemical NAD decrease. By using a compound that cells transform into NAD, scientists were able to reverse the effects of ageing by repairing inter-cell communication.

The reverse was the equivalent of turning a 60-year-old into a 20-year-old. Researchers hope to trial in humans in 2014.